Nano-particle Arrays for Molecular Sensing Applications

In this study, we present a numerical investigation of multi-layered nano-particle arrays composed of alternating metallic and dielectric layers, aimed at achieving significant electric field enhancement. The plasmonic properties of these composite nanostructures are analyzed using finite-difference time-domain (FDTD) simulations. The effects of structural parameters, including the number of layers, gap size, arm lengths, widths, total thickness, and metal fraction, on the electric field enhancement are systematically explored. Our results indicate that the proposed four-layered L-shaped nano-particles exhibit superior field enhancement compared to single-layered and simpler configurations. Furthermore, the sensitivity of these structures to the presence of dielectric nano-particles is examined, demonstrating the potential for molecular sensing applications. These findings highlight the strong potential of the proposed multi-layered nano-particle for high-sensitivity molecular sensing applications. The presented simulation and design approach contribute to the advancement of nanotechnology-enabled sensing platforms and future intelligent optical and communication systems.

کلیدواژه ها:

Composite structure ، Field enhancement ، Nano-particle ، Sensing application